Disconnect all mains in the controllers and plants before any connections. Mount IOD4 in a protective case close to the BMS controller. Set IOD4 output signal (V or I) at jumper selection at LK2 Configure BMS controller’s analogue inputs to match IOD4 output as in table 1. Connect IOD4 outputs to BMS analogue input and power up to IOD4 connection. Connect IOD4 inputs to plant (caution: ensure plant and controller are power off). Switch on plant and controller to test connection.

Installation

Description The Digital Input Expander allows 4 volt free inputs to be monitored by a single analogue input channel. The resultant analogue value can be decoded by the A to D function module in an BMS controller to produce internal digital status bits for alarm monitoring or other status input applications.

Features Expand capacity of existing DDC for cost effective

installation. Visual indication of LED inputs for easy commissioning Application includes lighting controls and monitoring status of equipments

Four Input Digital Multiplexer IOD4

Technical Specification Supply voltage: 24Vdc or ac ± 15% Supply current: 50mA max (I mode) 30mA max (V mode) Input Channels: 4 volt free contact switch 24Vdc Input Threshold: Upper 17.5V max (ON) level Lower 7.5V min (OFF) level Distance: Max. distance of IOD4 from controller 25m (V mode) 1000m (I mode) Output: Mode selectable by link header current/voltage (I/V) I: 0 to 20mA, max. resistance of load 250Ω V: 0 to 10Vdc, max. current 1mA LED: Single LED per input channel, LED on indicates contact closed Ambient limits: storage: -10(14 °F) to +70(158 °F) operating: -10 to+50 humidity: 0 to 90%RH non- condensing

Order Code

IOD4 Four Input Digital Multiplexer

Wiring, Connections and Jumper settings:

Scaling Table

IOD4

INPUT

IN1 IN2 IN3 IN4 VOLTAGE CURRENT

0 0 0 0 0.26 0.52

0 0 0 1 0.86 1.71

0 0 1 0 1.45 2.91

0 0 1 1 2.05 4.1

0 1 0 0 2.65 5.67

0 1 0 1 3.24 6.49

0 1 1 0 3.84 7.68

0 1 1 1 4.44 8.87

1 0 0 0 5.03 10.07

1 0 0 1 5.63 11.71

1 0 1 0 6.23 12.45

1 0 1 1 6.82 13.64

1 1 0 0 7.42 14.84

1 1 0 1 8.02 16.03

1 1 1 0 8.61 17.22

1 1 1 1 9.21 18.42

OUTPUT

For TREND Scaling the input channel must be setup correctly and the sensor type must be set up with the correct scaling. Link input channel to match TREND 4DIX output signal mode (V), use sensor type scaling mode 5,characterise, with input type set to match the IOD4 output signal mode and table below.

Mode Y E U L P I1 I2 O1 O2

I 2 3 270 -1 2 0 20 0 268.25

V 0 3 270 -1 2 0 10 0 268.25

E.C. Products Limited - Head Office EC House, Amberley Way, Hounslow Middlesex, TW4 6BH, United Kingdom

Tel:+44 (0)20 8569 4100 Fax:+44 (0)20 8569 4111

ECP reserves the right to change the information contained in this datasheet as and when required without notice. Users must take care to use the information contained in this leaflet. ECP will not accept the liability for damages, loss and expenses that may be caused by omissions and errors in the information provided.

VI

+I Offset

+V O

ffset

O H A O H A O H A O H A

24V0V0V

IN1

IN2

IN3

IN4

CO

M

CO

M

CO

M

CO

M

Rev

LK2